الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
neutron has, on many different grounds, developed into an indispensable asset in the investigation of condensed matter. Because the kinetic energy of thermal neutrons lies in the region of the energy of thermal motions of atoms (meV), the dynamics of condensed matter is also accessible to investigation. A constantly growing number of researchers from more disciplines are making use of this opportunity. The most important application of thermal neutrons is scattering on condensed matter, which is governed by well-known laws (conservation of energy, momentum, total spin etc.). To carry out a study in slow neutron physics, one needs high enough intensity sources of monochromatic slow neutrons. A range of wavelengths is selected from the incoming white beam by using a monochromator. The range of wavelengths accepted depends on the mosaicity of the crystal.